from abc import ABC, abstractmethod
import numpy as np

def get_class():
    'None 表示这是抽象基类'
    return None

class abs_decoder(ABC):
    def __init__(self):
        self.strFormat = 'abstract'
    def decode(self, file_path:str, **kwargs):
        ary = np.random.randn(100,3)
        return ary
    def get_name(self):
        return 'abstract decoder'    